Next episode? Do you mean episode 115?
Places: Tenrou Island

events: Gray vs Ultear (there will be some Gruvia scene ^^)

theme and end song: I wish and Boys be Ambitious

wow... that's an amazing idea! why don't u send it to hiro mashima so,he might add it...k? And thank u for replying.

Umm, that's not what I mean. Episode 115 is exactly what I said, Gray vs Ultear.
So you want a new idea for Hiro Mashima-sensei? LOL, he don't need any new ideas from fans. He already know how to make his fans satisfied.